<template>
  <transition name="fade">
    <section>
      <div class="loading">
        <!--<img width="24px" height="24px" src="../images/timg.gif">-->
        <!--<p class="desc">{{title}}</p>-->
        <span></span>
        <span></span>
        <span></span>
        <span></span>
        <span></span>
      </div>
    </section>
  </transition>
</template>
<script>
  export default {
    props: {
      title: {
        type: String,
        default: '正在加载...'
      }
    }
  }
</script>
<style scoped lang="css">
  .fade-enter-active, .fade-leave-active {
    transition: opacity .5s;
  }
  .fade-enter, .fade-leave-to /* .fade-leave-active below version 2.1.8 */ {
    opacity: 0;
  }
  section {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,.3);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .loading {
    width: 100%;
    text-align: center;
    /* flex-direction: column; */
  }
  .loading span{
    display: inline-block;
    width: 8px;
    height: 100%;
    border-radius: 4px;
    background: lightgreen;
    -webkit-animation: load 1s ease infinite;
    margin-left: 5px;
  }
  @-webkit-keyframes load{
    0%,100%{
      height: 40px;
      background: lightgreen;
    }
    50%{
      height: 70px;
      margin: -15px 0;
      background: lightblue;
    }
  }
  .loading span:nth-child(2){
    -webkit-animation-delay:0.2s;
  }
  .loading span:nth-child(3){
    -webkit-animation-delay:0.4s;
  }
  .loading span:nth-child(4){
    -webkit-animation-delay:0.6s;
  }
  .loading span:nth-child(5){
    -webkit-animation-delay:0.8s;
  }
</style>